Plug attachment



Y F. DoMlNlcK PLUG ATTACHMENT Filed March 23 1922 2 Sheets-Sheet 1 ,4TTORNEYS ,July 29 1924. 1,503,306

F. 'DOMINICK PLUG ATTACHMENT Filed March 23, l922 2 sheets-sheet 2Patented July 29, 1924.l

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FRANKLIN DOMINICK, OFKNEW YORK, N. Y.

PLUG ATTACHMENT. v

Application filed March 23, 1922. Serial No. 546,185.

To all .whom it may concern:

Be it known that I, FRANKLIN DOMINICK, a citizen of the United States,and a resident of the city of New York, borough of Manhattan, in thecounty and State of New York, have invented a new and Improved PlugAttachment, of which the following is a full, clear, and exactdescription.

This invention relates to electrical fixtures and particularly to animproved connector or plug attachment wherein different forms of plugsor connecting members may be properly accommodated for connecting asource of current to the device using the current.

The object of the invention is to provide an improved connector or plugstruc-ture wherein feed wires may be readily connected to either a screwsocket or a plug socket.

Another object of the invention is to provide an improved connectingdevice having a connecting contact formed either as a pair of plugs oras a screw Structure and means for receiving distributing wires havingplugs mounted thereon.

A still further object of the invention is to provide a connectingstructure for electric circuits wherein a plurality of independent feedwires may be connected to a single In the accompanying drawings- Figure1 is a side view of a plug attachment or connector embodying theinvention, certain parts being broken away for better illustrating theinvention.

Figure 2 is an edge view of the attachment or connector shown in Figure1.

Figure 3 is a sectional view through Figure 1 approximately on line 3-3.

Figure 4 is a sectional view through Figure 2 approximately on line 4-4.

Figure 5 is a view similar to Figure 1 but showing a modified form ofthe invention, the broken away part being taken on line 5 5 of Figure 6.

Figure 6 is an edge view of-the'structure shown in Figure 5.

Figure 7 is a sectional view through Figure 5 on line 7-7.

Figure 8 is a plan view of the blank used as a contact plate in thestructures illustrated in Figures 5 to 7.

Figure 9 is a perspective view of the body or casing shown in Figure 7Referrlng to the accompanying drawings by numeral, 1 indicates thecomplete attachment or connector designed to receive the contact blades2 of the respective plugs 3 and at the same time be capable ofconnection to a pair of sockets designed to receive the knife contacts 4or to a screw socket designed to receive the screw plug 5. The screwplug 5 is provided with a .pair Yof sockets of a well known constructionfor receiving the knife contacts 4, said knife contacts being thereforecapable of engaging the sockets of plug 5 or engaging permanent socketsin a fixture or wall where knife receiving sockets are provided insteadof screw plug receiving sockets.

The attachment or connector 1 is provided with a body having a centralsection 6 and side sections 7 and 8 formed preferably of insulatingmaterial and rigidly clamped together by bolts, rivets or otherVsecuring means 9. The section 6 is provided with laterally extendinglugs 10 and 1 1 which are adapted to receive the ends of the Contactblades 4, said contact blades having suitable apertures. A pair ofcontact plates 12 and 13 are provided for the section 6 and are formedwith apertures so that 'they may fit over the extensions or lugs 10 and11. rlhe inner faces of the sections 7 and 8 are provided with contactplates 14 and 15 which are specially constructed as shown in Figures 3and 4 so that they will each be provided with a depending member 16having an aperture for fitting over the respective lugs 10 and 11 andeach plate is also provided with sockets 17 as indicated particularly inFigures 2 and 4.

It will be noted that the knife contacts 4 are arranged with one endbetween the respective plates 12 and 14 and 13 and 15 so that a goodcontact is always maintained between the knife. contacts and therespective contact plates. It will also be noted that in addition to thesockets 17, the contact plates 12 and.14 and 13 and 15 respectively arespaced apart and form a smallv segmental chamber therebetween wherebythe knife contacts 2 of the respective plugs 3 may be positioned at anypoint around the arcshaped or curved face 18 of the connector 1. If theknife contacts 2 should be positioned at right angles to thecontactplates 12 to 15, they are forced in one of the sockets 17.

In the construction shown in Figures 1 to 4,' means have been providedfor three plugs having transversely arranged knife contacts and ampleIspaceis provided for plates though this is not absolutely necessary.

If desired, a space could be provided for more than three plugs 3 orless than three.

In the construction shown in Figures 4 to 8, means have been presentedwhich are designed to receive two plugs 3. In this form of theinvention, there is no segmental chamber between the respective platesas shown in Figure 2 but on the contrary only the T-shaped sockets 20.In this form of the invention instead of the connector or attachment 1being divided into three sections as shown in Figures 2 and 3, thedevice is divided into two sections along the line 21 instead of atrightangles thereto as shown in Figure 2. By reason of thisconstruction, the bolt or rivet 22 must extend as shown in dotted linesin Figure 5 instead of at right angles thereto as shown in Figure 3.Each of therespective sections 23 and 24 are identical so that thedescription of one will apply to both.

Section 24 (Fig. 7) is provided with openings 25 and 26'foraccommodating Ithe knife contacts 4, said knife contacts being rivetedor otherwise rigidly secured to the respective contact plates 27 and 28.Each of these plates when on a blank is formed as shown in Figure 8.vWhen this blank is bent along the line 29, a substantially U-shapedstructure in cross section is provided and inserted into suitablesockets in the section 24. A recess is provided for accommodating thedepressed portions 30 which form the sockets for the reception of thecontact knives of plugs 3. In this form of the invention, only two plugsmay be connected to the attachment or connector 1 while in Figure 1three may be connected though it is to be understood that any desirednumber may be provided for according to the requirements of anyparticularl case.

The arrangement of the attachment l with the knife contacts 4 and thescrew plug 5, permits the'device to be. connected to any of theconventional sockets now in common vuse and at the same time permits theuse of a .number of plugs 3 from one source of supply.

What I claim is In an attachment or connector of the characterdescribed, a body formed with a pair of parallel slots, each slot havinga plurality of notches extending at right angles to the respectiveslots# the notches of one slot being opposite the notches in the otherslot, a pair of Contact plates for each 'of said slots,'one plate oneach slot being formed with laterally' extending portions tting into therespective notches of said slots whereby contact prongs set parallel toeach other or at'right angles to each other may be readily inserted, anda terminal for each pair of plates.

.FRANKLIN DOMINICK.

